davenport



(No Model.) 2 Sheets-Sheet 1.

E. P. DAVENPORT. SKIVING MACHINE.

No. 578,547. 'Patented Mar. 9, 1897.

(No Model.) 2 sheets-sheet 2.

5F.1Llnf131\11 01v|?.l SKIVING MACHINE.

No. 578,547. Patented Mag. 9, 1897.

UNITED STATES PATENT OFFICE.'

EUGENE F. DAVENPORT, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO GEORGE XV. BROWN AND CHARLES H. BAYLEY, OF SAME PLACE.

sKlvlNe-MACHINE.

SPECIFICATION forming part of Letters Patent No. 578,547, dated March 9, 189'?. Application inea November 13, 1896. SerialNo- 611,961- (Nmodel.)

To a/ZZ whom it may concern- Beit known that I, EUGENE F. DAVENPORT, of Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Skiving-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

The present invention is embodied in a skiving-maehine, and relates mainly to the rotating cutting-bed,which supports the stock and presents it to the cutter, the said cuttingbed being adjustable with reference to its axis of rotation, so as to present the stock to the cutter at any desired angle in order to change the slant of the bevel along the edge of the skived leather.

The invention is herein shown as applied to a machine of that class in which a rotary disk cutter is employed, to which the stock is adapted to be presented by the cutting-bed embodying the invention and a feeding device cooperating therewith, the main portion of the machine being substantiallythe same as that Shown and described in prior patents, Nos. 220,909 and 273,931, granted to O. Amazeen.

'The machine comprises a cutter adapted to be rotated by a main shaft, thesaid cutter being supported at t-he lower end of an approximately vertical spindle, so that the disk or plate which forms the cutter proper lies in a generally horizontal plane, being preferably, however, somewhat inclined, so that when`stock is presented thereto lying horizontally the natural angle of the cutter operating upon the edge of said stock will cause the same to be skived on a certain bevel.

The cutting-bed consists of a drum mounted to rotate upon a horizontal shaft, the surface of said drum being adjacent to the skivingknife, and the stock, which is held against the said drum by a cooperating feed-disk and a spring-actuated presser, will thus be presented to the knife so that a strip is cut from the edge thereof.

In order to vary the slope or angle at which the strip is cut, it is obviously necessary to change the position of the knife with relation to the stock, or vice versa, such adjustment Ichanging the position of the knife, which necessitates a change in the position of the gears and is a somewhat difficult adjustment to make.

The present invention aims to provide means for producing the desired change in the position of the stock with relation` to the knife by adjusting the rotating cutting-bed axially, so that the stock fed forward thereby will be presented to the knife at any desired angle, it thus being unnecessary to make any change in the position of the cutter and its actuating-gears. 'To accomplish this, the cutting-bed, upon which the stock is supported and the rotation of which contributes to its forward feed movement, is connected with its actuatingshaft by a universal joint, and means are provided for adjusting the angular positionof the aXis thereof with relation to the knife, such adjustment being effected without interfering with the proper operation of the cutting-bed, since the universal joint, by which it is connected to its operatingshaft, admits of its rotation by said shaft while its aXis is set at any desired angle to that of the shaft.

Figure lis a front elevation of an Amazeen skiVing-machine having a cutting-bed embodying the present invention applied there'- to. Fig. 2 is a detail showing the said cuttingbed in end elevation. Fig. 3 is a horizontal section of the cutting-bed, taken on the line @o3 of Eig. l. Fig. 4 is a vertical sectional detail of the parts of the cutting-bed before they are assembled, Fig. 5 is a similar vertical section of the cutting-bed assembled and connected with the operating-shaft therefor, said shaft being shown in elevation. Fig. G is an end elevation of the'supporting or adj usting bracket for said cutting-bed detached; Fig. 7, a side elevation thereof; Fig. 8, an end elevation of the bracket shown in Fig. 6 with the plate which forms the bearing or support for the outer end ofthe cutting-bed removed; and Fig. Fig. 9 is a top plan View of the main portion of said bracket, also with the above-described plate removed.

The machine herein shown to illustrate the IOO invention is provided with the knife ct, condisk being mounted on a spindle CL2, having a beveled gear a'meshin'g with a similar gear b3 on a shaft b, shown as provided with a driving-pulley b2.

The cutting-bed embodying the present invention consists in a drum c, mounted upon a shaft d so as to rotate therewith, the` said shaft CZ being suitably connected with the shaft b, as by the bevel-gears d2 d3, so that as the drum turns the upper portion thereof moves toward the knife a during the operation of the machine. The stock which is fed to the machine is supported upon the said drum c and carried forward by the knurled surface c2 thereof in cooperation with a feeddisk e, mounted on a spindle e2 and pressed downward toward the drum c by means of a spring e3. WVhen, therefore, the stock is pushed between the surface of the drum c a-nd the-feed-disk e, it will be carried forward toward the knife a, the said knife being herein shown as set at a slight angle, so that it will cut or skive a strip from the edge of the stock. The lateral position of the said stock is determined by a gage f, lying close to the knurled surface c2 and adj ustably secured with rela tion thereto by means of a set-screw f2, the said gage being constructed and arranged in any7 suitable or usual way.

The drum c, as has been stated, is adapted to be rotated by the shaft d, and in order that the angular position of the knurled surface c2 may be changed with relation to that of the knife @the said drum is connected with the shaft' d by means of a universal joint, herein shown as consisting of a sphere or ball d4, (see Figs. 3y and 5,) connected with the shaft CZ- and coperating with a socket within the drum c, which may be constructed, as shown, in the followingmanner: The said drum c is made in two sections, the main portion c of which consists, as shown in Fig. 4, of a shell having within it a spherical socket c3, provided With an opening 04 through' which extends theshaft d, the said socket being hemisph-erical insha-pe, sofas to t the ball d4. The other section c5 consists of a block having a hemispherical socket c6, the said block being cylindrical in shape and adapted to be inserted in a cylindrical bore c5@ in the shell c, sol that when it is in place it completes the spherical socket for the ball d4.

Inorder that the drum may be rotated by theA shaft d, theA ball d4 is provided with projections d5, adapted to enter grooves c7, a portion of each groove being formed in the shell c andthe remainder in the block c5, (see Fig. 4,.) so as t0 register and form a continuous groove, as shown in Fig. 3, when the parts are assembled. I-t will be seen, therefore, thatthe drum constructed as above described may be set so that the knurled surface-c2 will stand. at any desired angle to the cutter a. by moving the-said drum on the ball d4 as a pivot and' that during the rotation of the shaft d the said drum, if properly held, will maintain the same position with relation to the knife, ac-

commodating itself to the shaft during the rotation thereof by the action of the ball-andsocket joint. The block c5 is secured to the shell c by means of screws cs, Figs. 2 and 5, and in order that the drum may be properly adjusted and maintained in position with relation to the knife the said drum is mounted in a support or bracket g, having a bearing g2 for an extension c20 of the said drum and arms g3 and Q30, extending substantially parallel to the axis of the drum, which is secured in said bracket by means of a plate g4, secured by screws at g5 to the ends ofrsaid arms, respectively, and having a central opening '96, which forms a bearing for the block c5, as

shown in Fig. 3. Thus the said drum has a bearing at each end in said bracket g, so that it will rotate therein, its plane of rotation being determined by the position of said bracket, it being obvious that the bracket can be moved while the drum pivots upon the ball d4 of the universal joint which connects the said drum with the shaft d. In order that the plane of rotation of the said drum may be varied with relation to the plane of rotation of the knife ct and secured in any desired position to which it may be adjusted, the said bracket is provided with a sl'ot Q7, through which extends a screw g8, secured to a portion of the frame of the machine, asindicated in Fig. 3, so that by loosening the said screw the bracket may be moved upon the ball d4 as a pivot until the knurled sufrface'c2 of the drum bears the proper relation to the knife a..

l After the adjustment is made the screw g8 is tightened to secure the bracket in place, and the said druinwill then be rotated by the shaft d, the universal joint operating to'dri-ve the said drum in its bearings g2 and g, so that thefupper surface of the knurled portion c2 will feed the stock forward and support it at the'proper angle to the knife a.

The gage fis secured upon a post f3 having a slot f4, by means of which it isV adjustably secured by a set-screw f5 to the bracket g, the said gage beingv substantially the same in construction andarrangement as in machines heretofore constructed.

To guidethe gage inV its movement,-the said gage 1s shown as provided with a tongue f adapted to enter a groove Q9, Figs. 3, 7, and 9, a screw-threaded opening gobein g provided for the screw f5.

I claim- 1. In a skiving-machine, the combination with a cutting-blade, of acutting-bed for presenting the stock to said cutting-blade consisting of a rotatable drum, and means for adjusting said drum to vary the aXis of rotation thereof with relationto thecutting plane of the blade, substantially as described.

2. In a skiving-machine, the combination with the cutting-bladeof a cutting-bed comprising a drum mounted on a rotating shaft andy adapted to support the stock and present it to said cutting-blade, a driving-shaft for IOO IIO

rotating said drum, a universal joint connecting said shaft and said drum, and means for adjusting the axis of rotation of said drum relative to that of its driving-shaf t, substantially as described.

3. In a skiving-maehine, the Combination with the cutting-blade of a cutting-bed oonsisting of a drum mounted on arotating shaft and adapted to su pport the stoel; and present it to said cutting-blade, a shaft for rotating said drum, a universal joint connecting said shaft and said drum, a support having bearings for said drum, and means for adj ustably securing said support to the frame of the machine, substantially as described.

4. In a skiving-machine, the combination with the cutting-blade, of a cutting-bed for presenting the stock to said cutting-blade eoni .sisting of a rotatable drum, means for adjusting said drum to vary the axis of rotation thereof With relation to the cutting plane of the blade; and a gage for the stock adjacent EUGENE F. DAVENPORT.

Witnesses:

H. J. LIvnnMoRE, N. P. FORD. 

